4/7x-1/5x=15

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Solution for 4/7x-1/5x=15 equation: 


x in (-oo:+oo)

(4/7)*x-((1/5)*x) = 15 // - 15

(4/7)*x-((1/5)*x)-15 = 0

(4/7)*x+(-1/5)*x-15 = 0

13/35*x-15 = 0 // + 15

13/35*x = 15 // : 13/35

x = 15/13/35

x = 525/13

x = 525/13

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